<body>
  <h2>基本选择器</h2>
  <div id="title"></div>
  <div class="context"></div>
  <div class="context"></div>
  <p>一段描述……</p>
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    <a href="file:///C:/Users/rise/Desktop/%E9%A6%96%E9%A1%B5/default/11.html">返回</a>
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